Browsing by Author "Liang, Linjun"

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Fully Integrated Photonic Microwave Tracking Generator on Heterogeneous III-V/Si Platform
(2017-01-01)
Chao, Rui-Lin
;
Liang, Linjun
;
Shi, Jin-Wei
;
Hulme, Jared
;
Kennedy, M. J.
Fully-integrated photonic microwave tracking generators are demonstrated for the first time. By sweeping the wavelength separation among two-locked DFBs and one tunable laser, a two-tone photo-generated RF signal with tunable difference in frequency can be generated. 2017 Optical Society of America
Fully Integrated Photonic Millimeter-Wave Tracking Generators on the Heterogeneous III-V/Si Platform
(2018-05-15)
Chao, Rui-Lin
;
Liang, Linjun
;
Shi, Jin-Wei
;
Komljenovic, Tin
;
Hulme, Jared
Fully integrated photonic microwave/millimeterwave (MMW) tracking generators, which include wavelength-tunable lasers, distributed feedback lasers, phase modulators, and high-speed photodiodes (PDs), are demonstrated on the heterogeneous integrated III-V-on-Si photonic platform. Two on-chip lasers are locked by an external optical phase-locked loop (OPLL), and the two-tone radio-frequency (RF) signals from the on-chip fast PDs can be photonically generated through the heterodyne-beating process between the wavelengthtunable laser and the OPLL output. Furthermore, the frequency spacing between such two-tone RF signals can be tracked by the oscillation frequency in the OPLL with a wide tunability (near dc to 10 GHz). Fast and truly continuous scanning of photo-generated MMW signals thus becomes feasible by simultaneously tuning the OPLL and the central wavelength of the tunable laser in the demonstrated photonic integrated circuit.